Double-acting ratchet-drill



' (No Model.) a Sheets-Sheet 1.

JLMEAHL,

. 'DOUBLE ACTING BATCH-ET DRILL.

No. 514,121. Patented Feb. 6, 1894.

3 Sheets-Sheet 2.

(N0 Mode 1.)

-J. MEAHLQ DOUBLE ACTING RATGHET DRILL.

N 514,127. Patented Feb. 6, 189 4.

. gmom vbo z (No Model.) 3 sheets-sheet a.

J. MEAHL.

DOUBLE ACTING RATGHET DRILL.

Patented Feb. 6, 1894.

if UNITED STATES JACOB MEAHL, OF CLEVELAND, OHIO.

DOUBLE-ACTING PATENT OFF CE.

RATCHET-DRILL.

SPECIFICATION forming part of Letter 5 Patent No. 514,127, datedFebruary 6, 1894.

Application filed July 8, 1893. Serial No. 479,970. (No model.)

To all whom it may concern: I

Be it known that I, J AOOB MEAHL, a citizen of the United States ofAmerica, residing at Cleveland, in the county of Ouyahoga and State ofOhio, have invented certain new and usefullmprovementsinDouble-ActingRatchet-Drills, of which the following is a specification,reference being had to the accompanying drawings. I

This invention relates to certain new and useful improvements in drivinggear for drills, and more particularly to that class known as ratchetdrills.

The primary object of the invention is to provide improved means bywhich either continuous or intermittent rotary motion may be imparted toa drill bit by the reciprocation of an operating lever or handle in anydirection.

A further object is to employ a'minimum number of interchangeablemembers in the construction of the device, said members being of commonform, and comparatively inexpensive of manufacture and at the same timepossessing advantages in point of simplicity, durability and generalefficiency.

In attaining these and other obj ects, various novel combinations andarrangements of elements are employed which will be hereinaftermorefullyset forth and specifically pointed out in theclaims.

When describing the invention in detail, reference will be had to theaccompanying drawings forming part of this specification and whereinlike numerals indicate corresponding parts in theseveral views,inWhl0l1* Figure l. is a view in perspective showing one form of ratchetdriving gear constructed and arranged to embody my improvements. Fig. 2.is a view in elevation of the same, with the several members showndetached and relatively positioned. Fig. 3. is a view showing a centralvertical longitudinal section of the device with the members inoperative position. Fig. 4. is a view in elevation showing theapplication of a dust cap or spherical cas- Tn thesedrawings,--1,denotes a tubular drill-bitreceiving spindle which isinteriorly screw-threaded to about half its length for engagement with afeed screw 2. This spindle is provided with a lower terminal enlargementor head 3,'which forms thereon an annular shoulder 4, and normallyresting against this shoulder is a collar 5, which is mounted to revolvefreely upon the spindle. Immediately above this collar and keyed to thespindle, is a beveled gear 6, which is driven by the inter-meshing bevelgears 7, 7. These gears are cored out'centrally and radially recessed asat 8, to receive spring pressed dogs or pawls 9, and are rotatablymounted on ratchet pinions 10, 10, which latter are fixed to or formpart of the frame 11. The frame 11, is secured to the spindle by meansof the bearing pins 12, 12, which are passed through centrally alignedopenings 13, 14, of the frame and collar and are screw-threaded adjacentthe heads thereof to engage threaded openings of the'frame, thusefiectually locking the several members composing the device, inoperative position. The frame 11, is preferably V-shaped, as best shownin Fig. 1., with the branches 15, 15,- thereof enlarged to form circularheads 16, 16, between which the driving gears 7, 7, are mounted. At thejunction of these branches, a rearwardly extending and integral socketpiece 17, is formed, into which any suitable handle 18, may be fitted.

The socket disks 10, 10, are herein shown arranged so as to produce acontinuous rotary movement of the bit 19, when the handle isreciprocated. This arrangement consists in forming the teeth of thedisks on the opposite slant, and referring to Fig. 1., it will be seenthat on the upward stroke of the handle the pawl carried by the lefthand gear will engage the ratchet disk and form a locked connectionbetween the gear and the rotating disk, thus imparting motion to the bitthrough the driven gear 6. The pawl carried by the righthand gear,during this movement of the handle is not engaged by the ratchet, butrides idly thereon. As the handle is forced downwardly the lastmentioned pawl engages, while the other rides freely. If desired, thesepawls and ratchets may be toothed alike to drive only on the downwardstroke of the handle.

An important feature of this invention resides in the peculiararrangement by which tion to describe either a straight or a curved lineand without loss of motion as a result.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a ratchet drill, the combination with a drill-bit-receivingspindle provided circumferentially with engaging teeth, of a handleterminating in a bifurcated head, toothed disks formed on theinnerfacesof the branched arms of said head, gears sleeved on the disks andengaging the teeth of the spindle, and spring pressed pawls carried inrecesses of the gears and engaging the toothed disks, as specified.

2. In a ratchet drill, a handle terminating in a bifurcated head andprovided on the in- JACOB MEAHL.

Witnesses:

JAMES A. WILEY, JAMES HUTSON.

